Abstract:
During 2005-2007, at the Agricultural Research and Development Station of
Podu-Iloaiei, Iaşi County, a site with different climatic conditions, the following wheat lines
were tested: PI-2344-98, PI-2801-98, PI-2487-99, PI-2322-00, PI-2726-99, PI-2557-01, PI-
2416-95, PI-2657-99 and PI-2561-99, compared to the Fundulea 4 control. On this biological
material, we have determined some physiological features and quantitative traits, production
capacity, correlations between productivity and production elements. Under various climatic
conditions, the lowest obtained yield was of 13 q/ha in PI-2657-99 and PI-2561-99 lines, in
2007, and the highest yield was of 72 q/ha in PI-2344-98 line, followed by PI-2801-98 line,
with a yield of 71 q/ha, obtained in 2006. In most of the wheat lines, the mean yield on the
three experiencing years was higher than the control, the distinctively significant yield
increases reaching 9 q/ha (24%) in PI-2344-98 and PI-2726-99 lines. As concerns the number
of spikes/m2, PI-2344-98 and PI-2726-99 lines had very significant yield increases, followed
by PI-2487-99, PI-2322-00 and PI-2561-99 lines, with significant yield increases. As
compared to the interaction genotype x environment, we have obtained statistically significant
assured differences in PI-2726-99 line. The number of grains/ spike had higher statistically
assured values against Fundulea 4 control in PI-2487-99 line. On average of three years, the
1000-grain weight had higher values against the control, the PI-2416-95 line being found on
the first place (43.0 g). Compared to the V×A interaction, we did not get significant differences
for the number of grains/spike and the 1000-grain weight, the tested genotypes reacting
similarly to the change of climatic conditions at the experiencing period. The dependence
between the studied traits and the production capacity was shown in most of cases by
statistically assured positive correlations. The obtained results have demonstrated the success
of PI-2344-98 and PI-2726-99 lines in the process of variety creation, corresponding to the
objectives followed by wheat breeding at the Agricultural Research and Development Station
of Podu-Iloaiei.
